package com.cuit.service.Book;

import org.springframework.stereotype.Service;

import java.text.ParseException;
import java.text.SimpleDateFormat;

@Service
public class TimeCha {
    public    String countTimeCha(String startTime, String endTime, String format){
        // 按照传入的格式生成一个simpledateformate对象
        SimpleDateFormat sd = new SimpleDateFormat(format);
        long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数
        long nh = 1000 * 60 * 60;// 一小时的毫秒数
        long nm = 1000 * 60;// 一分钟的毫秒数
        long ns = 1000;// 一秒钟的毫秒数
        long diff;
        long day = 0;
        long hour = 0;
        long min = 0;
        long sec = 0;
        String result = "0";
        // 获得两个时间的毫秒时间差异

        try {
            diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime();
            day = diff / nd;// 计算差多少天
            hour = diff % nd / nh + day * 24;// 计算差多少小时
            min = diff % nd % nh / nm + day * 24 * 60;// 计算差多少分钟
            sec = diff % nd % nh % nm / ns;// 计算差多少秒
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return day + "天" + (hour - day * 24) + "小时"
                + (min - day * 24 * 60) + "分钟" + sec + "秒";
    }
}
